A post shared by Dee Devlin (@deedevlin1) on May 6, 2018 at 6:38am PDT

To celebrate the UFC champ's milestone birthday, the longterm couple parties in a Las Vegas casino.

McGregor later ignited outrage when he posed with Russian President Vladimir Putin at the World Cup final.

"This man is one of the greatest leaders of our time and I was honored to attend such a landmark event alongside him. Today was an honor for me Mr. Putin. Thank you and congratulations on an amazing World Cup," he wrote.

As Putin has been accused of human rights abuses - including banning "gay propaganda" and is accused of poisoning a former spy - many of his 24 million followers expressed their outrage at McGregor.

"Research the history" wrote one fan, while another stated, "And there goes my support for you. A great fighter, a poor judge of character."